Rarefraction.
Crest- tallest spot on transverse wave.
Trough- shortest point on transverse wave.
Compression - spot on a compressional wave where the waves are closer together.
Rarefraction - spot on a compressional wave where the waves are farther apart.
Well, half-life is the radioactivity of an identified isotope that decreases by half of the actual value.
So, your answer would be C.
<span>They are emitted by the unstable nuclei of certain atoms.
That's all I could find out; Sorry I couldn't be more of an help.</span>
So you would divide 1530 by 8 and that’s how you’d get your answer, so it should be (blank)m
